Help with Heads Up!

[BigJohn043]

I am having a really hard time with heads up. I probably only win ~35% of my heads up opportunities which is killing my ROI.

Below is a heads up I lost with a big lead. Let me know what you think of my play.... Comments on all hands appreciated.

Hand 1

Party Poker No-Limit Hold'em Tourney, Big Blind is t400 (2 handed)

BB (t2140)
Hero (t5860)

Preflop: Hero is Button with 8[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/spade.gif[/img].
Hero calls t200, <font color="CC3333">BB raises to t800</font>, Hero calls t400.

Flop: (t1600) K[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img] <font color="blue">(2 players)</font>
<font color="CC3333">BB bets t1340 (All-In)</font>, Hero folds.

Final Pot: t2940

Hand 2

Party Poker No-Limit Hold'em Tourney, Big Blind is t400 (2 handed)

Button (t2940)
Hero (t5060)

Preflop: Hero is BB with 2[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img].
Button folds.

Final Pot: t600

Hand 3

Party Poker No-Limit Hold'em Tourney, Big Blind is t400 (2 handed)

BB (t2740)
Hero (t5260)

Preflop: Hero is Button with 9[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img].
<font color="CC3333">Hero raises to t800</font>, BB folds.

Final Pot: t1200

Hand 4

Party Poker No-Limit Hold'em Tourney, Big Blind is t500 (2 handed)

Button (t2340)
Hero (t5660)

Preflop: Hero is BB with 4[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/club.gif[/img].
Button calls t250, Hero checks.

Flop: (t1000) 4[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="blue">(2 players)</font>
Hero checks, <font color="CC3333">Button bets t500</font>, <font color="CC3333">Hero raises to t1700</font>, <font color="CC3333">Button raises to t1840 (All-In)</font>, Hero calls t140.

Turn: (t4680) 5[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players, 1 all-in)</font>

River: (t4680) 2[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players, 1 all-in)</font>

Final Pot: t4680

He showed me QQ and took down the pot to take the chip lead.

Hand 5

Party Poker No-Limit Hold'em Tourney, Big Blind is t500 (2 handed)

BB (t4680)
Hero (t3320)

Preflop: Hero is Button with 9[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
Hero calls t250, <font color="CC3333">BB raises to t1500</font>, <font color="CC3333">Hero raises to t3320 (All-In)</font>, BB calls t1820.

Flop: (t6640) K[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players, 1 all-in)</font>

Turn: (t6640) Q[img]/images/graemlins/spade.gif[/img] <font color="blue">(2 players, 1 all-in)</font>

River: (t6640) K[img]/images/graemlins/club.gif[/img] <font color="blue">(2 players, 1 all-in)</font>

Final Pot: t6640

He showed me KQ for a full house and I took second...